Side-lasting machine



April 13 1926.

C. B. SPALSBURY SIDE LASTING MACHINE Fild April 5.

2 Shae ts-Shee-t 1 "lvzve 76% 7' I.

dig/a A ril 13, 1926.

c. B. SPALSBURY SIDE LASTING MACHINE Filed April 5, 1923 2 SheeQs-Sheet 2 e412 6% y/W F Patented Apr. 13, 1926.

UNITED STATES PATENT. OFFICE.

GHARLES B. SPALSBURY, OF ST. LOUIS, MISSOURI, ASSIGNOR TO JOHNSON, STEPHENS AND SHINKLE SHOE COMPANY, OF ST- LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

Application filed April 5,

To all whom it may concern:

Be it known that I, CHARLES B. SrALs- BURY, a citizen of the United States, and resident of St. Louis, State of Missouri, have invented an Improvement in Side-Lasting Machines, of which the following description, in connection with the accompanying drawings, is a specificatioin like letters on the drawings representing like parts.

In carrying out themanufacture of my novel type of shoe shown and described in my copending applications Ser. No. 555, 588, filed April 19, 1922, and Ser. No. 566,496, filed June 7, 1922, it'is desirable to provide machine operations to last and trim the uppers, and my present invention is directed to a machine and method for this purpose.

In the single soled shoe construction of my prior applications, or the construction of same with a plurality of layers united to constitute substantially a single sole, it is necessary to effect the lasting of the shoe upper into the marginal recess around the forepart of the sole This operation involves the lasting and fitting of the upper materials into a slot, groove, or recess in the sole, or laminated sole, about the forepart, and such upper materials must be trimmed, elther before said last1ng,'after the same, or substantially simultaneously therewith, in order to prevent bunching and objectionable ridges in the shoe. My present invention is a machine for 'efiecting this trimming action substantially simultaneously, or immedately succeeding the side lasting operation, and by means operable to effect the trimming action while the upper materials and insole are held under tension and in lasted position by the side lasting devices. This affords a very important advan tage. It is, of course, necessary to have the lining and shoe upper, constituting the upper materials, to enable the lasting, stretching, and pulling of the same into position snugly about the last With a surplus width or extent capable of being engaged by the side lasting devices and forced into lasted position around the margin of the sole of improved shoe. Consequently it is very d.i...ea11:. and even impractical to trim the part.

SIDE-LASTING MACHINE.

1923'. Serial No. 630,131.

upper materials to a proper extent prior to the lasting, so that no surplus bunching will be forced into the marginal groove or recess on the sole, particularly at the fore- Therefore, this trimming action must be performed, ordinarily, after the shoe is lasted. In my said prior applications'this trimming was explained as being done by hand, and in the present application I accomplish this purpose automatically and by machine, substantially as a part of the lasting action. V

Referring to the drawings, illustrating a preferred embodiment of the present invention and as applied to the side lasting machine and shoe of my prior application Ser. No. 555,588,

Fig. 1 is a plan view partly in cross-section, illustrating the trimming and lasting instrumentalities and means for operating same;

2-2 of Fig. 1;

Fig. 3 is a side view; 1

Fig. 4 is a fragmentary View of the means for actuating the trimming devices; and 7 Fig. 5 is a cross-sectional view on the line 55 Of'Flg. l;

In the drawingsI have illustrated in diagrammatic form my type of shoe assembled on a last 1 having a sole 2 and upper materials 3, the same being in lasted position with the upper 3 forced into the marginal grooves 4 of the sole 2, and held therein in lasting position by the side lasting devices 50,

Fig. 2 is a cross-sectional view on the line 50. These side lasting devices are preferably slotted at '51 to facilitate the driving of the lasting tacks through said slots from the marginal sections of the sole into the lasted upper, as explained in said prior applica tions. These side lasting'devices are mounted in guideways 53, and are actuated sub stantially as shown in my said prior application, Serial No. 555,588. The upper engaging portions of the devices 50 may be serrated as illustrated at 52 for better engagement of the upper to pull, force, strain and last the same into the marginal groove 4:

atje'ach side of the fo'ri' part.

Mounted on the plane 55 carrying the (le vices is a slide 60, having; secured at the forward end portion a trin'nning knife 61. This knife is continuous and is adapted to he moved forwardly over the slotted devices 50 to trim or-cut the upper directly in the bottom of the recess 4, permitting the removal of the surplus material 13, and the Withdrawal of the cutting, knives prior to drivingthe lasting-tacks through the slot 51, and hence while the lasting devices 50 are in position holding the upper in lasted position.

In order to effect a reciprocating movement of the cutting knives 61 forward and backw'ardly, l prefer to mount the sa 'ie to slide'relatively with the plate 55. To hold saidknives firnily in position, I apply a cover- 56 substantially coextensive witlrthe plate'55andextendingover the devices 50.

In fac-tl m'ay make therover plate 56 and devices 50 substantially equal with the slotted rooves '51 tlierethrough', workn'i'g the cutting knife 61 therebetivecn and thus insuring'the' tii'in'n'ning ofthe upper materials substantially midway of the depth of 'the slot in which they have been forced during lasting.

To effect this reciprocating action l'provide-an eccentric stud having its shanlz 20 tlireaded into the plate 'a-nd aneccentric 21 fitted thereon and engaging-acorrespondin'g slot' 22 in said slide '60. Adjustment is afierded between"the stud 20 and its eccent-rio'22' by 1neans'ofa'set screw 23. To hold the same in assembled position 1 supply a handle 25 havi'ngth'ere'on ah'ub26, the latter of sufiicient diameter to extend over andhear upon the coveror'topinost'portion Thehub 26 off thehandle is' keyed to the shaft 20 as illustrated at 27. This'construc tioir' affords sufli'ciei'it throw to remove the knives 61 relatively With the slotteddevices 5O into upper trimming and cutting position, beyond the edge of the said rlcvices,

' ZIS'ShOW-n in'Fig'. 2, and to retraetthe'same to dotted line position: illustrated in Fig. l at 63,thus clearingitheslots "51 and permitting the-"d1"iving of the lasting tracks tluiough said slots.

llheoperation otthe' machines will be readily appreciated. Upper and sole being assembled on the last, the side lasting devices 50' are manipulated to strain the upper material's :ever *lhe last and then said devices are moved orwardlyto force, pull, andlast the upper into the groove lalong'the "tore part of thesol'e, hold-ingthe same in lasted position; 'lhereupon the handles 25 are manipulated toreciprocate the slide and knives 6'1, sliding or forcing: them beyond the edges-oiithe lasting devices; into trimming engagement with the upp'er, cuttingthe same he at the extreme rear part" as shown. knives" are thereuponwithdrawn by reverse movement on the handle 95 uncovering the slots 51, whereupon lasting;- tacks are driven through said slots to retain the upper and sole in lasted posit-ion and the side lasting; devices withdrawn and the shoe removed.

hiy present: invention enables the trimming to be done accurately and instantly, and should the knives cut into the sole beyond the depth of the slot, no harm or difliculty will he experienced. In order to make the trimming knives readily removable and attachable to'theslides 60, I provide screws 66 which still further enable the trimming knives to be changed in co-ntoi'ir it necessary lo operate onwdifierent styles and sizes ol footwear.

As clearly illustrated in'Fig. 2, thedop plate 55 anrlth'e 'bott'onipush' devices 50, jam the upper materials into the slotot'the sole, holding same stretched therebetween and permitting th'ecutting knife to fun'ction while the upper is thus held stretched at both sides, tacilitating trimming; saving continual. sharpening of knives, and effecting a most satisfactory operation. In orderto limit the torwa'rd -movement oit-th'e slid'e*60 carrying the knife 611 may add a stop at any desired point, andhr any convenient manner; as forexample a pin to limit the swingof the handles 25, such -pinto be removable through different holes in the toplat-e55 to limit the depth of'cut of the trimming knife; as will be readil'y understood.

Myinven' on is further describedand defined in the 7 form of "claims as follows i 1. Apparatus for lasting and trimming shoe-upper materials, comprising lasting devices adap'ted to engage-, force, and hold upper materials into lasted position in the marginal recess o'i a-shoe sole, upper trimming means mounted 'insaid lasting devices and reciprocable longitudinally thereof; and means for reciprocating said trimming means while" the lasting devices are held stationary wherebyupper materials held" in lasted positionby th'e lasting devices are trimmed and cut.

2.11 1 a machine torjtrimming' surplus material from the-uppers of b'oots andshocs aiter'lasting, comprising means a1 ed'to engage theupp'er materials in spaced relation, to hold the marginal ed' ge'o l the-upper to he removed and to hold the marginal edge of the-uppeij lo beretained in thc'shoe, in stretched and'tensi-oned'condition, and means operative, whilethe'upper is so held, to cut the upper between said holding devices.

3-.Irr a macl'iin'e for trimming surplus material from the uppersotboots and shoes att'ter'th'e upper is placed in lasted position, comprising: means adapted to engage the upperr'materials at a plurality of spaced 1,580,449 I v g points for holding the marginal edge of the junction of the marginal edge of the upper to upper to be removed and for, holding in be removed and the-marginal edge of the stretched and tensioned condition the margi-i upper to be retained. M

nal edge of the upper that is to be retained in. In testimony whereof, I have signed my 5 the shoe structure, and means slidably name to this specification.

mounted for reciprocating movement in said I V I engaging means to cut the upper at the I V CHASE. SPALSBUR Y. 

